材料科学
有机发光二极管
量子效率
咔唑
二极管
光电子学
光致发光
圆极化
荧光
接受者
手性(物理)
单重态
发光二极管
光化学
光学
纳米技术
激发态
原子物理学
化学
物理
微带线
图层(电子)
夸克
量子力学
手征对称破缺
凝聚态物理
Nambu–Jona Lasinio模型
作者
Tingting Liu,Zhi‐Ping Yan,Jiajun Hu,Yuan Li,Xu‐Feng Luo,Zhen‐Long Tu,You‐Xuan Zheng
标识
DOI:10.1021/acsami.1c16223
摘要
Direct emission of circularly polarized light from organic light-emitting diodes (OLEDs) is a research hotspot as it could increase the efficiency and significantly simplify device architecture of OLED-based 3D displays. In this study, R/S-OBS-Cz and R/S-OBS-TCz with axial chirality were efficiently prepared by using a stable chiral octahydro-binaphthol unit, carbazole/3,6-ditert-butylcarbazole donors, and a 5,5,10,10-tetraoxide acceptor. The chiral unit-acceptor-donor structure provides them not only thermally activated delayed fluorescence (TADF) characteristics with minor singlet-triplet energy gaps of 0.04 and 0.05 eV but also obvious circularly polarized photoluminescence (CPPL) phenomenon with dissymmetry factors of 8.7 × 10-4 and 6.4 × 10-4 in codoped films. Meanwhile, the CP-OLEDs prepared by enantiomers exhibit good device performances with the maximum external quantum efficiency reaching 20.3% and ideal efficiency roll-off as well as obvious CPEL properties with a |gEL| factor up to 1.0 × 10-3.
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